From: "sawa (Tsuyoshi Sawada)" <sawadatsuyoshi@...>
Date: 2013-10-06T00:26:09+09:00
Subject: [ruby-core:57680] [ruby-trunk - Feature #8987] map/collect	extension which handles arguments


Issue #8987 has been updated by sawa (Tsuyoshi Sawada).


=begin
In case of commutative operations like `+`, you can do it like this:

    [1, 2, 3, 4].map(&4.method(:+))
    # => [5, 6, 7, 8]
=end
----------------------------------------
Feature #8987: map/collect extension which handles arguments
https://bugs.ruby-lang.org/issues/8987#change-42299

Author: sowieso (So Wieso)
Status: Open
Priority: Normal
Assignee: 
Category: core
Target version: current: 2.1.0


Please consider extending map/collect by allowing additional arguments to be passed to proc, like:
A: [1,2,3,4].map :+, 4
and/or
B: [1,2,3,4].map 4, &:+

=> [5, 6, 7, 8]

Variant A is probably more readable. Variant B is more versatile (allows arbitrary arguments to be passed to block).



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